second gen perfomance upgrades na
 

i hope this is some help for you guys

Aftermarket Performance

Non-Turbo Performance Modifications-Street Legal

Exhaust

86-88

Racing Beat "PowerPulse" high performance muffler system, >5 hp.

HKS Sport Exhaust, 8hp

Mariah (Design Energy)-HKS "Cat-Back" Exhaust, 15% increase=21.9hp

MazdaTrix Exhaust, "Noticeable" (HKS?)

89-92

Racing Beat "PowerPulse" high performance muffler system, >5hp.

HKS Sport Exhaust, 8hp

Mariah (Design Energy) HKS "Cat-Back" Exhaust, 15% increase=24hp

MazdaTrix Exhaust, "Noticeable" (HKS?)

Intake

86-92

HKS "PowerFlow", 9hp

Mariah (Design Energy) Nelson/Paxton Supercharger, 50% increase=73hp (86-88)/80hp (89-92)

Other

Mariah (Design Energy) Electric fan/shroud package, up to 12hp.

Non-Turbo Performance Modifications-Off Road Only

Exhaust

MazdaTrix Dual PreSilencer Exhaust, ~30@Wheel horsepower

Racing Beat PowerPulse Presilencer (replaces Catalytic Converters), 18hp (with stock cat-back exhaust)

Intake

Cartech/Mariah turbo Pkg., up to 129hp (86-88)/up to 115hp (89-92)

Mikuni 44mm Side Draft carburetor

Weber 48mm/51mm Down Draft carburetor

MazdaTrix supercharger Kit, up to 154hp

Second Generation RX-7 Turbo II Performance Upgrades (Trey Cobb)

The layout of this list is as follows: Upgrades are ordered roughly in the order that you should do you upgrades. All upgrades can be done seperately but often, one part will not do much for you unless you install the next part that complements it. These groups of parts are commonly refered to as "Stages". HKS has probably the best organization of stages and even if you don't use all their parts, you can get the general idea of how you should upgrade

You probably should have posted this in the second gen section,

And how are the results compiled? Was actual before and after dyno testing done???

WTF

24HP from a Cat-back???????

That is BS

^^^^^^